Question

Statement (S). Arthropods are the most successful of all known animal groups.
Reason (R). Arthropoda exhibits the greatest adaptive radiations and has adapted to diverse habitats.

• A. Both S and R are true, and R explains S.
• B. Both S and R are true, but R cannot explain S.
• C. Only S is correct, R is wrong.
• D. Both S and R are wrong.

Answer 1

Answer: (A)

Both S and R are true, and R explains S.

The success of arthropods is largely due to their unique cuticle, segmentation and jointed appendages.

1. Cuticle- Being tough, it protects the arthropods against predators and forms jointed exoskeleton for muscle attachment. Being light, it does not add to body weight. Being impervious to water, it checks to dry up of the body.

2. Group of segments and the jointed appendages have become specialized for a great variety of functions.

So, the correct answer is option A- 'Both S and R are true and R explains S'.